<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form"
      auto-complete="on" label-position="left">
      <div class="title-container">
        <h3 class="title">登录</h3>
      </div>
      <el-form-item prop="username">
        <el-input ref="username" v-model="loginForm.username" placeholder="用户名" name="username"
          type="text" tabindex="1" auto-complete="on" prefix-icon="el-icon-user-solid"></el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input :key="passwordType" ref="password" prefix-icon="el-icon-lock" v-model="loginForm.password"
          :type="passwordType" placeholder="密码" name="password" tabindex="2" auto-complete="on"
          @keyup.enter="handleLogin"></el-input>
      </el-form-item>
      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;"
        @click.prevent="handleLogin">登录</el-button>
      <div class="tips">
        <span style="margin-right:20px;">用户名: admin</span>
        <span> 密码: 随意</span>
      </div>
    </el-form>
  </div>
</template>
<script>
  import { validUsername } from '@/utils/validate'
  export default {
    name: 'Login',
    data() {
      const validateUsername = (rule, value, callback) => {
        if (!validUsername(value)) {
          callback(new Error('请输入用户名'))
        } else {
          callback()
        }
      }
      const validatePassword = (rule, value, callback) => {
        if (value.length < 6) {
          callback(new Error('密码不能少于6位'))
        } else {
          callback()
        }
      }
      return {
        loginForm: {
          username: 'admin',
          password: '111111'
        },
        loginRules: {
          username: [{ required: true, trigger: 'blur', validator: validateUsername }],
          password: [{ required: true, trigger: 'blur', validator: validatePassword }]
        },
        loading: false,
        passwordType: 'password',
        redirect: undefined
      }
    },
    watch: {
      $route: {
        handler: function (route) {
          this.redirect = route.query && route.query.redirect
        },
        immediate: true
      }
    },
    methods: {
      showPwd() {
        if (this.passwordType === 'password') {
          this.passwordType = ''
        } else {
          this.passwordType = 'password'
        }
        this.$nextTick(() => {
          this.$refs.password.focus()
        })
      },
      handleLogin() {
        this.$refs.loginForm.validate(valid => {
          if (valid) {
            this.loading = true
            this.$store.dispatch('user/login', this.loginForm).then(() => {
              this.$router.push({ path: this.redirect || '/' })
              this.loading = false
            }).catch(() => {
              this.loading = false
            })
          } else {
            console.log('error submit!!')
            return false
          }
        })
      }
    }
  }
</script>
<style>
  .login-container {
    background-image: url(@/assets/background.png);
    min-height: 100%;
    width: 100%;
    background-color: #15255b;
    overflow: hidden;
  }
</style>
<style lang="scss">
  /* 修复input 背景不协调 和光标变色 */
  /* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */
  $bg:#283443;
  $light_gray:#fff;
  $cursor: #fff;

  @supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
    .login-container .el-input input {
      color: $cursor;
    }
  }

  /* reset element-ui css */
  .login-container {
    .el-input {
      display: inline-block;
      height: 47px;
      width: 85%;

      input {
        background: transparent;
        border: 0px;
        -webkit-appearance: none;
        border-radius: 0px;
        color: $light_gray;
        height: 47px;
        caret-color: $cursor;

        &:-webkit-autofill {
          box-shadow: 0 0 0px 1000px $bg inset !important;
          -webkit-text-fill-color: $cursor !important;
        }
      }
    }

    .el-form-item {
      border: 1px solid rgba(255, 255, 255, 0.1);
      background: rgba(0, 0, 0, 0.1);
      border-radius: 5px;
      color: #454545;
    }
  }
</style>
<style lang="scss" scoped>
  $bg:#2d3a4b;
  $dark_gray:#889aa4;
  $light_gray:#eee;

  .login-container {
    min-height: 100%;
    width: 100%;
    background-color: $bg;
    overflow: hidden;

    .login-form {
      position: relative;
      width: 520px;
      max-width: 100%;
      padding: 160px 35px 0;
      margin: 0 auto;
      overflow: hidden;
    }

    .tips {
      font-size: 14px;
      color: #fff;
      margin-bottom: 10px;
      text-align: center;

      span {
        &:first-of-type {
          margin-right: 16px;
        }
      }
    }

    .title-container {
      position: relative;

      .title {
        font-size: 26px;
        color: $light_gray;
        margin: 0px auto 40px auto;
        text-align: center;
        font-weight: bold;
      }
    }

    .show-pwd {
      position: absolute;
      left: 100px;
      top: 7px;
      font-size: 16px;
      color: $dark_gray;
      cursor: pointer;
      user-select: none;
    }
  }
</style>
